Wow! A practical application for Thermodynamics! Had class been taught this way, I would have paid more attention! As far as UIC, I wish this would have been done here in Chicago. I for one would have _LOVED_ to see it! Paul UIC '92 Flames Hockey Fan since '86 -- Paul Troy [log in to unmask] (Paul Troy) (708) 632-5225 If all the world is a stage, then I want to operate the trap door. -Unknown =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=